Printing tickets

[NSS Guy]

1st time out this year. Freshen up the motor, repaired the transmission after rear end breakage, new ring and pinion . Put these 3 passes together running hoosier 30x9 radials . Driver needs to work on the rt's.

 

[NSS Guy]

I made 10 passes total, put 4 10.34- 10.35 passes together with 29.5x10.5 bias slicks . The radials are a proven .15 quicker than bias. The radials did add 300rpm at the stripe .

 

[NSS Guy]

All runs with these tiny air cleaners

 

[67MPRFAN]

Nice runs... that's a lot of passes for a John Holt event

 

[NSS Guy]

Interesting video , not sure what is good or bad. 10.34@129

 

[NSS Guy]

Interesting video , not sure what is good or bad. 10.34@129

 

[Ironbuilt]

Cool video NSS!

 

[dvw]

Looks good. That can only be bad for the rest of us.
Doug

 

[Mike Gaines]

I talked to the Cal Trac tech and he said they expect the rear end to "rise" just like yours does.
Mine done exactly the same thing...but no sliders, just regular shackles.
And our 60 foots are very similar.
Our ET's are very similar also.
My typical 60 foot is 1.41/1.42 and my typical 1320 ET/MPH is 10.16/1017 @ 131 and change.
I have the complete Cal Trac setup also.
I run 30" Hoosier (11.25 tread width, bias ply) "stiff sidewall" slicks, with tubes, 93" rollout)

 

[NSS Guy]

Looks good. That can only be bad for the rest of us.
Doug

I was waiting for your response..lol
Like I said still need to work on the rt's!!
I hadn't had the radials on the car for 3 years, took a little tuning to get them to work. It's crazy a smaller tire will pick up like that. BUT, when those radials spin its over! no recovery with the hoosiers.

 

[67MPRFAN]

Does both sets of tires have the same roll out

 

[NSS Guy]

I talked to the Cal Trac tech and he said they expect the rear end to "rise" just like yours does.
Mine done exactly the same thing...but no sliders, just regular shackles.
And our 60 foots are very similar.
Our ET's are very similar also.
My typical 60 foot is 1.41/1.42 and my typical 1320 ET/MPH is 10.16/1017 @ 131 and change.
I have the complete Cal Trac setup also.
I run 30" Hoosier (11.25 tread width, bias ply) "stiff sidewall" slicks, with tubes, 93" rollout)

Mike, how do have the caltracs setup? I set mine up with the pin just touching the leaf spring in bottom hole, no preload. Curious how everyone else sets their bars. As you can see in the video no tire spin, but the track was in really good shape. I am footbraking leaving around 2200 rpm depending on roll out and reaction time. I am anywhere from 2000-2500 depending. I ran a .500 pro tree race at Monster Mopar and was at 3000 to cut a .030 - .040 light.

 

[Mike Gaines]

My bars are set like yours.
How in the world do you cut a .030 lite on a .500 pro tree....I would think you would have to have 24" front tires to do that....with a 28" or 29" front tire isn't it almost impossible to cut better than a .100 lite on a pro .500 tree.
My home track is Famoso, CA (Bakersfield) and the track is always prepped perfect. I have absolutely NO tire spin even leaving at 4000 rpm off my Trans Brake.
I just replaced my 28" tall Moroso DS2 tires with M/T 24" Front Runners.....in an effort to cut better reaction times....could NOT cut better than a .110 with the 28" tall tire. The 28" tall tire is just in the beam too long to get a good reaction time.
I will be trying out my 24" front tires at the Big Race in Las Vegas next week.

 

[dvw]

How in the world do you cut a .030 lite on a .500 pro tree.(quote)
Practice tree. Before long you'll find that there will be very little difference between pro and full tree. I still work at it but usually about .010 difference.
Doug

 

[bwheeler051]

I'm curious about the radial adding rpm. I have been debating on going to a radial M/T pro bracket radial 29.5x10.5
Mine hits the tires pretty hard with the weight in it and the bias ply tires want to wrap up and lose a little reaction time. I'm making small suspension adjustments at a time to work with that. The issue is, its a moving target when i am always changing the rear weight. I am already at 15lbs of air in the bias ply tire. I thought a radial might help this a little.


Doug is correct. If you truly see and leave on the flash of the bottom bulb, then leaving on the flash of the top bulb on a .500 pro tree is the same spot and same reaction. We run them fairly often footbraking.

 

[Mike Gaines]

But....my question is how does a 28" or 29" tall tire allow at .010 to even a .040 reaction time because the tall tire stays in the beam so long whereas a 24" front tire allows a quick reaction time because it allows the beam at the rear of the tire to connect much sooner than the taller 28" or 29" front tire...please help me with this
The only thing I can see if you really, really, deep stage with the taller tire to shorten the time it takes for the rear of the tire to connect the reaction time beam...???

 

[dvw]

You'll help R/T WAY more staging deep than you will going with a shorter tire. You have to balance the cars R/T and your physical R/T. Not everybody has a quick R/T. Two very successful foot brake racers I know go full deep every time. I asked them why? They said because their R/T is slow. They both win, a lot.
Doug

 

[NSS Guy]

Mike, how is your rt's when footbraking vs transbrake? I am wondering if the delay is in tb. button or valve body. As Doug and Brent said it can be done. Using a blinder would have the effect as a pro tree, no anticipating the light. I use .320 rollout on my parctice tree.

 

[Tex013]

I'm curious about the radial adding rpm. I have been debating on going to a radial M/T pro bracket radial 29.5x10.5
Mine hits the tires pretty hard with the weight in it and the bias ply tires want to wrap up and lose a little reaction time. I'm making small suspension adjustments at a time to work with that. The issue is, its a moving target when i am always changing the rear weight. I am already at 15lbs of air in the bias ply tire. I thought a radial might help this a little.


Doug is correct. If you truly see and leave on the flash of the bottom bulb, then leaving on the flash of the top bulb on a .500 pro tree is the same spot and same reaction. We run them fairly often footbraking.

Radial does not grow so rpm is a bit higher
I run the pro brackets . With a transbrake this year its been a relearn . Normally run the 28s ran the 29.5s 2 weeks ago . With the brake I have to use more air pressure it seems . Last year ran 16 1/2 footbraking , 2 weeks ago 18 . Will try 28s this weekend at the higher pressure
The 29.5 is 30" tall I lose 200-250 rpm at the stripe and my sixty drops 0.04 on average even with 500 extra rpm in the 2 step
We run a 400 tree both pro and sportsman so cant help there

Tex

Tex

 

[dvw]

Mike, how is your rt's when footbraking vs transbrake? I am wondering if the delay is in tb. button or valve body. As Doug and Brent said it can be done. Using a blinder would have the effect as a pro tree, no anticipating the light. I use .320 rollout on my parctice tree.

Agreed for our type of car .320 is pretty close. If your late at .320, you'll be late at the track unless your anticipating.
Doug